Spring tightening means for window sash



' Julie 1939- J. w. SHRIVER El AL 2,153,955

srnme TIGHTENING mums FOR wxunow SASH Filed June 14, 19:51

' INVENTO v JOHNW $11511 FRANK J3 fioovEH ATTORNEY.

Patented June 27, 1939 SPRING TIGHTENIlgG MEANS roe wmnow ASH John W.Shriver and Frank S. Hoover, Wichita, Kans.

Application June 14, 1937, Serial No. 148,025

1 Claim.

Our invention relates to a spring tightening means for window sash.

The object of our invention is to provide a spring element, and applythe same to members of a window frame as tensioning means to move sashthat are loose fitting in the frame for snug engagement with theirrespective stop and parting bead, said stop and bead being on the innerside of their respective sash, rendering the joints there-between airtight, but permitting said sash to slide freely upward and downward inthe frame.

A further object of our invention is to provide a spring element thatcan be applied to the frame elements that forms the sash runs withoutchange or mutilation of the same for the purpose set forth in the abovefirst object.

A still further object of our invention is to form the outer ends ofeach spring portion in such a way as to avoid end contact with the sash,when the latter is moved therefrom, and returned to engagementtherewith.

A still further object of our invention is to provide a springtensioning element having means to permit the same to rock, as the sashmoves from engagement therewith, by which arrangement end engagement isalso avoided, and when the said sash is moved to full engagement withthe spring element, full tension for the purpose set forth is had, itbeing understood, that the spring portions may be the same as whenstationarily arranged, except the out turn extremity of the ends may beof less curvature.

A still further object of our invention is to provide a springtensioning element, that is inexpensive, easily applied, and efficientin its function, and the said springs may be applied plurally, spacingthe same along the frame on opposite sides thereof, to engage with eachside rail of the sash.

These and other objects will hereinafter be more fully explained,reference being had to the accompanying drawing forming a part of thisspecification and in which like characters will apply to like parts inthe different views.

Referring to the drawing:

Fig. 1 is a cross sectional view through a conventional type of a windowframe, and portion of wall to which it is applied, also showing in likesection, the upper and lower sash and an end View of the spring elementsas applied to their respective members of the frame.

Fig. 2 is an inside elevation of a fragmentary portion of a frame, asarranged for a single sash that is subject to being raised and lowered,show- (01. sea-1r ing the application of the spring element to the blindstop, the screws omitted, also a sectional View through the bottom railof the sash moved upward from. engagement therewith, also illustratingthe possibility of avoiding end engagement with the spring, when thesash is being returned.

Fig. 3 is a view of the spring turned 90 degrees from that shown in Fig.2.

Fig. 4 is a similar view to that of Fig. 2, except showing the springelement rockable to avoid end contact.

The invention herein disclosed consists of a spring tensioning elementconsisting of a pair of leaf springs I, oppositely extending from aflange element 2, that is bent at right angles and integrally joined toone edge of the said springs, said flange having a plurality ofapertures 3 through which screws will engage as securing means therefor,to a blind stop 4 or a parting bead 5, between which the upper sash 6,of a double hung window, will slidably engage vertically, while theinside or lower sash 1 is slidable in like manner and being secured byan inside stop 8, the latter being adjustable to and from its respectivesash, but permanently secured at a position to permit the sash to slidefreely, and not sufficiently binding the same, to render it Weathertight, as the said sash may be irregular in thickness or slightlycurved, and in such cases our spring element, as applied to the partingbead, will accommodate resiliently permitting the sash to slide freely,but at all points retain the same to air tight engagement with theinside stop as at A, weatherproofing the sash.

Attention is now directed to the upper or outside sash as fitted to theframe, and being retained in like sliding tendency to that of the othersash, while the blind stop and parting bead are rigid and permanentlysecured to the frame jamb 9, in other words there being no means foradjustment, the manufacturer of such frames provide ample room forimperfections of the sash, and to overcome such loose fitting condition,we attach our spring elements to the edge of the said blind stop,forcing close engagement against the parting bead as at B, for air tightengagement as described for the other sash.

The same condition of loose sash fitting as in the above description,occurs in single sash frames as shown in Figs. 2 and 4, in. which caseour spring elements will function with equal efiiciency, and the saidelements being spaced along each side of such sash, and those abovedescribed, will disengage in their sliding movement from the springs,and to insure against end contact of the said sash when brought toengagement therewith, note that the outer end portion of each leaf has abend outward as at C, by which means, the terminating portion of thesash is free to pass there-under, forcing the said sash to snugengagement as above described.

We have also arranged as a modification, a spring tensioning elementhaving a flange with a single aperture for screw engagement, and uponwhich the element will rock as shown by dotted lines D, in Fig. 4, inwhich case the outer terminal ends of each leaf of the spring may beslightly turned outward without danger of end engagement, due to itsoutward rocked position, but brought to full tension as the sash movesto engagement with the other leaf, and such other modifications may beemployed as lie within the scope of the appending claim.

Having fully described our invention what we claim as new and desire tosecure by Letters Patent is:

In a spring tightening means for a Window sash slidably mounted in aframe, a rockable leaf spring and a flange having a single apertureconcentrically positioned therein through which a screw will engage, theflange being integrally joined to one edge of the leaf spring mediallyof its length and positioned at right angles to the side of the spring,the spring having a curvature where it joins the flange, the concavityof the curvature oppositely positioned to the flange while the outer endportions of the spring each having a curvature opposite to that of thefirst named curvature, said spring element being attached to the frameby the screw in working relation to the sash and medially of the upperand lower extremity thereof so that when the sash moves in contact withthe spring the latter will respond in its function as the sash moves toengagement therewith, and the said spring being adapted to rock on theaxis of the aperture in the flange by which means one end of the springis rocked outward by the sash moving from engagement with the spring toavoid contact with the end thereof when the sash returns to engagementtherewith.

JOHN W. SHRIVER. FRANK S. HOOVER.

